Detectives in Baltimore County, Baltimore City and the FBI Baltimore Field Office conducted the investigation and charged the following men in connection with 24 convenience store robberies:

Omar Hance, 31, of the 600 block East 29th Street, Baltimore

Darrell Blackwell, 26, of the 8700 block Greystone Lane, Columbia

Willie Vinson, 24, of the 1000 block Bethune Road, Baltimore

The armed robberies of 7-Eleven, Royal Farm and High’s stores took place between Dec. 23 and Feb. 7. Authorities said the crimes were not concentrated in any particular geographic area, but happened in various neighborhoods at all times of the day.

Authorities said in all 24 cases, one suspect drove and remained in the vehicle while the other two robbed the store. Employees were threatened with a stun gun and a pellet gun (which looks like an actual handgun). No one was injured.Cash was stolen in all but two of the cases.

Fifteen of the robberies occurred in Baltimore City and nine occurred in Baltimore County. They are:

Police said shortly after the last two robberies, on Feb. 7, Baltimore City police officers and Baltimore City Police Department’s Foxtrot helicopter located the suspect vehicle and followed it. It fled at a high rate of speed, crossing into Baltimore County.

The suspects were apprehended by Baltimore County and Baltimore City officers in the parking garage at Greater Baltimore Medical Center.

"There is no doubt that these three men would have continued victimizing businesses and store employees if our robbery detectives in the County and the City had not used solid police work to put the pieces together, and then relentlessly pursued this case," Baltimore County Police Chief Jim Johnson said.

Hance and Blackwell face 11 counts, including armed robbery and first-degree assault. Vinson faces 12 counts, including armed robbery and first-degree assault. All are held without bail at the Baltimore City Detention Center.

"These arrests are a testament to the effective partnership and dedication of city, county and federal law enforcement agencies to apprehend those individuals who threaten the safety of our communities," said Byron Conaway, commander of the Baltimore Police Citywide Robbery Unit.